What are the different types of cache consistency models?

What are the different types of cache consistency models?

Cache consistency models define how updates to cached data are propagated to ensure all users see the same data. The main types include strong consistency, eventual consistency, causal consistency, and read-your-writes consistency.

Can you explain strong consistency in more detail?

Strong consistency ensures that once a write is acknowledged, all subsequent reads will reflect that write. This means that all nodes in a distributed system see the same data at the same time.

What about eventual consistency?

Eventual consistency allows for temporary discrepancies between nodes. Updates will propagate eventually, ensuring that all nodes will converge to the same value over time, but not immediately.

Which model is the most commonly used?

Eventual consistency is commonly used in distributed systems like NoSQL databases because it offers better performance and availability compared to strong consistency.